
/**
 * Copyright 2009 cestum.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
package org.waveprotocol.wave.model.document.operation.algorithm.transformer {
import org.waveprotocol.wave.model.document.operation.Attributes;
import org.waveprotocol.wave.model.document.operation.AttributesUpdate;

final class ReplaceAttributesCache extends RangeCache {
	
	private var oldAttributes:Attributes;
	private var newAttributes:Attributes;
	
	
	var parent:Target;
	function ReplaceAttributesCache(t:Target, oldAttributes:Attributes, newAttributes:Attributes) {
		this.parent = t;
		this.oldAttributes = oldAttributes;
		this.newAttributes = newAttributes;
	}
	
	
	override function resolveRetain(itemCount:int):void {
		parent.flushAnnotations();
		parent.targetDocument.replaceAttributes(oldAttributes, newAttributes);
		parent.otherTarget.targetDocument.retain(1);
	}
	
	
	override  function resolveDeleteElementStart(type:String, attributes:Attributes):void {
		parent.otherTarget.doDeleteElementStart(type, newAttributes);
		++parent.otherTarget.depth;
	}
	
	
	override  function resolveReplaceAttributes(oldAttributes:Attributes, newAttributes:Attributes):void {
		parent.flushAnnotations();
		parent.targetDocument.replaceAttributes(newAttributes, this.newAttributes);
		parent.otherTarget.targetDocument.retain(1);
	}
	
	
	override function resolveUpdateAttributes(update:AttributesUpdate):void {
		parent.flushAnnotations();
		parent.targetDocument.replaceAttributes(this.oldAttributes.updateWith(update), this.newAttributes);
		parent.otherTarget.targetDocument.retain(1);
	}
	
}
}